7 citations · 9 across the 2 of their papers we have counts for
6 papers
Dispersion of the dielectric function of a charge-transfer insulator
R. O. Kuzian, R. Hayn, A. F. Barabanov
We study the problem of dielectric response in the strong coupling regime of a charge transfer insulator. The frequency and wave number dependence of the dielectric function $ε({\b…
Recursion method and one-hole spectral function of the Majumdar-Ghosh model
R. O. Kuzian, R. Hayn, J. Richter
We consider the application of the recursion method to the calculation of one-particle Green's functions for strongly correlated systems and propose a new way how to extract the in…
Spin-Polaron approach to the Fermi surface evolution in the normal state of cuprates
A. F. Barabanov, R. Hayn, A. A. Kovalev +2
A semi-phenomenological approach to describe the evolution of Fermi surface (FS) and electronic structure with doping is presented which is based on the spin-fermion model. The dop…
The electronic structure of CuSiO3 - a possible candidate for a new inorganic spin-Peierls compound ?
H. Rosner, S. -L. Drechsler, K. Koepernik +2
Electronic structure calculations are presented for the well-known CuGeO3 and the recently discovered isostructural CuSiO3 compounds. The magnitude of the dispersion in chain direc…
Direct exchange in the edge-sharing spin-1/2 compound MgVO_3
I. Chaplygin, R. Hayn, K. Koepernik
Bandstructure calculations with different spin arrangement for the spin-chain compound MgVO_3 have been performed, and paramagnetic as well as magnetic solutions with ferro- and an…
Grassmann Variables and Exact Solutions for Two-Dimensional Dimer Models
R. Hayn, V. N. Plechko
We discuss some aspects of a new noncombinatorial fermionic approach to the two-dimensional dimer problem in statistical mechanics based on the integration over anticommuting Grass…